CVE-2026-64226
sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path
Description
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path In scx_root_enable_workfn(), put_task_struct(p) is called before scx_error() dereferences p->comm and p->pid. If the iterator's reference is the last drop, the task is freed synchronously and the deref becomes a UAF. Move put_task_struct() past scx_error().
INFO
Published Date :
July 24, 2026, 4:16 p.m.
Last Modified :
Aug. 13, 2026, 12:01 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Move put_task_struct() past scx_error().
- Ensure task struct is valid before dereferencing.
- Apply the kernel patch.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64226.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64226 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64226
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64226 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64226 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12 up to (excluding) 6.12.92 Added Reference Type kernel.org: https://git.kernel.org/stable/c/45c7c4e3db8b700307313c035ea08be829a7f21b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/57e19ba3f58a67eb924022a5a60b67fd08e5cbbd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9a415cc53711f2238e0f0ca8a6bcc796c003b127 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cf396941901858b0de426cdcd3974eea6a02c98c Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f0e1a0643a59bf1f922fa209cec86a170b784f3f', 'lessThan': 'cf396941901858b0de426cdcd3974eea6a02c98c', 'versionType': 'git'}, {'status': 'affected', 'version': 'f0e1a0643a59bf1f922fa209cec86a170b784f3f', 'lessThan': '45c7c4e3db8b700307313c035ea08be829a7f21b', 'versionType': 'git'}, {'status': 'affected', 'version': 'f0e1a0643a59bf1f922fa209cec86a170b784f3f', 'lessThan': '57e19ba3f58a67eb924022a5a60b67fd08e5cbbd', 'versionType': 'git'}, {'status': 'affected', 'version': 'f0e1a0643a59bf1f922fa209cec86a170b784f3f', 'lessThan': '9a415cc53711f2238e0f0ca8a6bcc796c003b127', 'versionType': 'git'}], 'programFiles': ['kernel/sched/ext.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/sched/ext.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path In scx_root_enable_workfn(), put_task_struct(p) is called before scx_error() dereferences p->comm and p->pid. If the iterator's reference is the last drop, the task is freed synchronously and the deref becomes a UAF. Move put_task_struct() past scx_error(). Added Reference https://git.kernel.org/stable/c/45c7c4e3db8b700307313c035ea08be829a7f21b Added Reference https://git.kernel.org/stable/c/57e19ba3f58a67eb924022a5a60b67fd08e5cbbd Added Reference https://git.kernel.org/stable/c/9a415cc53711f2238e0f0ca8a6bcc796c003b127 Added Reference https://git.kernel.org/stable/c/cf396941901858b0de426cdcd3974eea6a02c98c